Tunable pure spin currents in a triple-quantum-dot ring

Abstract

Electron transport properties in a triple-quantum-dot ring with three terminals are theoretically studied. By introducing local Rashba spin-orbit interaction on an individual quantum dot, we calculate the charge and spin currents in one lead. We find that a pure spin current appears in the absence of a magnetic field. The polarization direction of the spin current can be inverted by altering the bias voltage. In addition, by tuning the magnetic field strength, the charge and spin currents reach their respective peaks alternately.

5 pages, 2 Figures

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Cited by in corpus (10)

• Interference effects in the Coulomb blockade regime: current blocking and spin preparation in symmetric nanojunctions
• Spin transport through a quantum network: Effects of Rashba spin orbit interaction and Aharonov-Bohm flux
• Magnetic Quantum Wire as a Spin Filter: An Exact Study
• Spin-orbit interaction induced spin selective transmission through a multi-terminal mesoscopic ring
• Curvature effect on spin polarization in a three-terminal geometry in presence of Rashba spin-orbit interaction
• Interface sensitivity on spin transport through a three-terminal graphene nanoribbon
• Master equation based steady-state cluster perturbation theory
• Externally controlled selective spin transfer through a two-terminal bridge setup
• Detection of spin bias in four-terminal quantum-dot ring
• Rashba-induced transverse pure spin currents in a four-terminal quantum dot ring